Manufacture of artificial silk



Patented Dec. 11, 1934 UNITED STATES MANUFACTURE OF ARTIFICIAL SILK Gustav Hardt, Elizabethton, Tenn., assignor to American Bemberg Corporation, New York, N. Y., a corporation of Delaware No Drawing. Application October 4, 1932, Serial No. 636,181

6 Claims.

My present invention has to do with a new and novel method for producing artificial cellulosic products with a low lustre.

More especially, my present invention concerns a new method for producing artificial filaments which possess the desirable lustre of real silk.

One object of the present invention is to provide a novel method for producing a filament or thread of artificial silk which has greater opacity c and covering power, and which possesses a low or dull lustre.

Other objects will become apparent from a study of the following specification and claims.

In the manufacture of artificial filaments, a cellulosic solution is prepared (cuprammonium, viscose, nitrocellulose or organic derivatives of cellulose), and spun or extruded into a medium which tends to harden the filaments thus formed. My present invention has to do with a new and novel mixture or compound, to be added to the spinning solution before the filaments are' formed, and which remains in the filaments during the after treatment thereof. The presence of this substance in the filaments gives them the greater opacity and covering power desired and renders them lustreless.

I make up an emulsion which is intimately mixed with the spinning solution before the filaments are extruded therefrom. This solution 9 contains a terpineol, and by this term I intend to cover all terpineols, including CH- CH:

vi-Terpineol CHLO GIELC (OH) (CH CHnCHz CHr-CH: OH

fl-Terpineol CH O (OH) CPLC CH2-OH2 \CH:

CHz-CH: CH3 -TerpineoI 0113.0 (OHJ =C GHQ-CH2 CHs and other forms including terpineol-l, terpin- 5 eol-l, dihydrocarveol, iso-pulegol, delta-3-menthenol-8, and delta-2-menthenol-l.

The emulsion includes:

Percent Casein 5 Terpineol 5 Parafiin wax 5 Petrolatum 5 (All percentages being calculated on the cellulose content of the solution.)

Having set forth my invention as required by the patent statutes, what I desire to claim is:

I 1. A spinning solution for the manufacture of artificial products comprising a cellulosic spinning solution, about 5% casein and about 5% of a monocyclic terpene of the group consisting of alpha-terpineol, beta-terpineol, gamma-terpineol, terpineol-l, terpineol-4, dihydrocarveol, iso-pulegol, delta-3-menthenol-8 and delta-2 menthenol-l, said percentages being based upon the cellulose content of the solution.

2. A spinning solution for the manufacture of artificial products comprising a cellulosic spinning solution, about 5% casein, about 5% paraffin wax and about 5% of a monocyclic terpene of the group consisting of alpha-terpineol, betaterpineol, gamma-terpineol, terpineol-l, terpineol-i, dihydrocarveol, iso-pulegol, delta-3- menthenol-8 and delta-2-menthenol-1, said percentages being based upon the cellulose content of the solution.

3. A spinning solution for the manufacture of artificial products comprising a cellulosic spinning solution, about 5% casein, about 5% parafiin wax, about 5% petrolatum and about 5% of a monocyclic terpene of the group consisting. of alpha-terpineol, beta-terpineol, gamma-terpineol, terpineol-l, terpineol-4, dihydrocarveol, iso-pulegol, delta-3-menthenol-8 and delta-2- 'menthenol-1, said percentages being based upon the cellulose content of the solution.

4. A soft-lustre cellulosic filament containing about 5% casein and about 5% of a monocyclic terpene of the group consisting of alpha-terpineol, beta-terpineol, gamma-terpineol, terpineol-l, terpineol-i, dihydrocarveol, iso-pulegol, delta-B-menthenol-B and delta-2-menthenol-1, said percentages being based upon the weight of the cellulose of the product.

5. A soft-lustre, cellulosic filament containing about 5% casein, about 5% paraflin wax and about 5% of a monocyclic terpene of the group consisting of 'alpha-terpineol, beta-terpineol, gamma-terpineol, terpineol-l, terpineol-i, dihydrocarveol, iso-pulegol, delta-3-menthenol-8 and delta-2-menthenol-1, said percentages being based upon the weight of the cellulose.

6. A soft-lustre, cellulosic filament containing about 5% casein, about 5% paraffin wax, about 5% petrolatum and about 5% of a monocyclic terpene of the group consisting of alpha-terpineol, beta-terpineol, gamma-terpineol, terpineol-l, terpineol-i, dihydrocarveol, iso-pulegol, delta-3-menthenol-8 and delta-Z-menthenol-l, said percentages being based upon the weight of the cellulose.

GUSTAV HARDT. 

